var a, b, sum;
a = 5;
b = 100 % 7;
sum = a > b && a * b > 0;
document.write('a=', a, ',b=', b, ',sum=', sum, '<br/>');
sum = ((++a) + 3) / (2 - (--b)) * 3;
document.write('a=', a, ',b=', b, ',sum=', sum, '<br/>');
sum = (+true) ** b + (-((-null) ** b));
document.write('a=', a, ',b=', b, ',sum=', sum, '<br/>');

a = (b = 5, c = b + 2, c + 4)
console.log(a, b, c)